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Föroreningsnedfall från järnvägstrafik
Swedish National Road and Transport Research Institute.ORCID iD: 0000-0001-6600-3122
Swedish National Road and Transport Research Institute.
2003 (Swedish)Report (Other academic)
Abstract [sv]

Environmental and health hazards, caused by exposure to particulate matter,

have received increased attention in recent years. Railways can also be a

source of particulate matter, which has been highlighted for instance where

problems with dusting along railways have been reported. This is the case

especially in built-up areas where the railway traffic has to reduce its

speed before stations. Examples of the problems are odours in the

surroundings and dust deposition onto parked vehicles, damaging car finishes.

The dust is in this case assumed to have its origin in the brakes, wheels,

rails, and electric conductors but may also be caused by resuspension of the

wear particles of the same origins which had been deposited on the railway

embankment. In this study three field sites were established for the

collection of deposition using funnels and bottles, complemented by vertical

filters at the same positions in order to collect airborne particles. Also

the peat samples were collected at one site in order to study the

accumulation of pollutants in the railway surroundings. The length of each

measuring period was about two weeks, and a total of nine measuring periods

were performed. The results indicate that at least 15 metals have the railway

as a source in one or more of the investigated areas (Fe, As, Pb, Co, Cu, Cr,

Mn, Ni, V, Ga, Ge, Nb, Mo, Rh, and Sb). The deposition of the metals

decreases exponentially from the railway and is levelled out at a distance of

50-100 metres. In several samples of the deposition, the background

concentration levels are exceeded. At the Lund field site, all samples exceed

the background, and at the Vikingstad and Store Mosse field sites, most of

the samples exceed the background. This does not point out the railway as the

single source since the sites are situated in areas more or less affected by

human activities. The mean concentrations of As, Cd, Co, Cu, Cr, Mn, Ni, Sr,

and Zn at the Lund field site exceed concentrations measured in urban areas

in Stockholm. At the Vikingstad field site the mean concentrations of As, Pb,

Cd, Cr, Mn, Ni and Sr exceed the urban measurements and at Store Mosse the

same goes for As and Sr. A comparison with limit values (concerning supply of

sewage sludge to farm lands) shows that, at worst, deposition of Cd and Ni is

at the same level as the limit values or exceeds these, while Pb, Cu, Cr and

Zn reach half the limit value in the worst case. The dispersion of the

pollutants is related to weather and traffic conditions. Dryer and warmer

weather in combination with higher traffic volume shows clearer relations

than damp, cold weather with lower traffic volumes. Analyses show that the

wind seems to be an important transport mechanism for railway related metals.

In order that the results may be generalized to be valid for the entire

railway network, more detailed knowledge of the mechanisms involved in the

wear and spreading of the metals is required.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI meddelande 947 , 2003.
VTI meddelande, ISSN 0347-6049
Keyword [en]
Swedish, Sweden, Emission, Pollution, Railway, Particle, Urban area, Rural area, Dust, Metal, Distance, Soil
Research subject
Railway: General works, surveys, comprehensive works, Railway: Environment; Road: Transport, society, policy and planning, Road: Environment
URN: urn:nbn:se:vti:diva-5038OAI: diva2:673868
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2016-02-25

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